期刊
SCIENCE
卷 375, 期 6578, 页码 285-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abj2096
关键词
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资金
- US Department of Energy (DOE), BES Scientific User Facilities Division Field Work Proposal [100317]
- Laboratory Directed Research and Development Program
- US DOE, Office of Science, Office of Basic Energy Sciences (BES), Chemical Sciences, Geosciences, and Biosciences Division (CSGB)
- DOE Laboratory Directed Research and Development program at SLAC National Accelerator Laboratory [DE-AC02-76SF00515]
- German Research Foundation [KL-1439/10]
- Fellow program of the Max Planck Society
- UK EPSRC [EP/R019509/1, EP/T006943/1, EP/I032517/1]
- Chemical Sciences, Geosciences and Biosciences Division, US DOE, Office of Science, BES [DE-SC0012376]
- Swiss National Science Foundation
- National Center of Competence in Research-Molecular Ultrafast Science and Technology NCCR-MUST
- NSF [1605042]
- DOE [DE-FG02-04ER15614]
- German BMBF [05K19PE1]
- US DOE, Office of Science, BES [DE-AC02-76SF00515]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1605042] Funding Source: National Science Foundation
In this study, time-resolved measurements were performed using attosecond soft x-ray pulses to track the evolution of a coherent core-hole excitation in nitric oxide. The coherent electron motion was controlled by tuning the photon energy of the x-ray pulse.
In quantum systems, coherent superpositions of electronic states evolve on ultrafast time scales (few femtoseconds to attoseconds; 1 attosecond = 0.001 femtoseconds = 10(-18) seconds), leading to a time-dependent charge density. Here we performed time-resolved measurements using attosecond soft x-ray pulses produced by a free-electron laser, to track the evolution of a coherent core-hole excitation in nitric oxide. Using an additional circularly polarized infrared laser pulse, we created a clock to time-resolve the electron dynamics and demonstrated control of the coherent electron motion by tuning the photon energy of the x-ray pulse. Core-excited states offer a fundamental test bed for studying coherent electron dynamics in highly excited and strongly correlated matter.
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